<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 搜索与添加区域 -->
            <el-row :gutter="20">
                <el-col :span="8">
                    <!-- 搜索与添加内容 -->
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="addDialogVisible=true">添加用户</el-button>
                </el-col>
            </el-row>
            <!-- 用户列表区域 -->
            <el-table :data="userlist" style="width: 100%" border stripe>
                <el-table-column type="index" ></el-table-column>
                <el-table-column label="姓名" prop="username"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="电话" prop="mobile"></el-table-column>
                <el-table-column label="角色" prop="role_name"></el-table-column>
                <el-table-column label="状态" prop="mg_state">
                    <!-- 使用作用域插槽 scope.row 代表这一行的数据  -->
                    <template slot-scope="scope">
                        <!-- {{scope.row.mg_state}}  下面的v-model会覆盖上面的prop -->
                        <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
                        </el-switch>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="220px" >
                    <!-- 作用域插槽 -->
                    <template slot-scope="scope">
                        <!-- {{scope.row}} -->
                        <!-- 修改按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
                        <!-- 删除按钮 -->
                        <el-button type="danger" icon="el-icon-delete" size="mini"
                         @click="removeUserById(scope.row.id)"></el-button>
                        <!-- 分配角色按钮 -->
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <el-button type="warning" icon="el-icon-star-off" size="mini" @click="setRole(scope.row)"></el-button>
                        </el-tooltip>

                        
                    </template>
                </el-table-column>
            </el-table>
            <!-- 分页功能 -->
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[1, 2, 5, 10]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total">
            </el-pagination>
        </el-card>
        <!-- 添加用户的对话框 -->
        
        <el-dialog
            title="添加用户"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClosed">
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px" >
            <el-form-item label="用户名" prop="username">
                <el-input v-model="addForm.username"></el-input>
            </el-form-item>
            <el-form-item label="密码" prop="password">
                <el-input v-model="addForm.password"></el-input>
            </el-form-item>
            <el-form-item label="邮箱" prop="email">
                <el-input v-model="addForm.email"></el-input>
            </el-form-item>
            <el-form-item label="手机" prop="mobile">
                <el-input v-model="addForm.mobile"></el-input>
            </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser" >确 定</el-button>
            </span>
            </el-dialog>
            <!-- 修改用户的对话框 -->
            <el-dialog
            title="修改用户信息"
            :visible.sync="editDialogVisible"
            width="50%" @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px" >
            <el-form-item label="用户名">
                <el-input v-model="editForm.username" disabled></el-input>
            </el-form-item>
            <el-form-item label="邮箱" prop="email">
                <el-input v-model="editForm.email"></el-input>
            </el-form-item>
            <el-form-item label="手机" prop="mobile">
                <el-input v-model="editForm.mobile"></el-input>
            </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo" >确 定</el-button>
            </span>
            </el-dialog>

            <!-- 分配角色的对话框 -->
            <el-dialog
                title="分配角色"
                :visible.sync="setRoleDialogVisible"
                width="50%" @close="setRoleDialogClose">
                <div>
                    <p>当前的用户：{{userInfo.username}}</p>
                    <p>当前的角色：{{userInfo.role_name}}</p>
                    <p>分配新角色：
                     <el-select v-model="selectedRoleId" placeholder="请选择" >
                    <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id"></el-option>
                    </el-select>
                    </p>
                </div>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
                </span>
            </el-dialog>
    </div>
</template>

<script>
    export default {
        name : 'Users',
        data() {
            return {
                //  获取用户数据列表的参数对象
                queryInfo : {
                    query:'',   //搜索关键字
                    // 当前的页数
                    pagenum : 1,  //不能是字符串
                    // 当前每页显示多少条数据
                    pagesize : 2
                },
                // 存储用户列表
                userlist: [],
                total:0, //总的数据列数
                value:false,
                // 显示和隐藏添加用户的对话框
                addDialogVisible : false,
                // 添加用户的表单数据
                addForm:{
                    username :'',
                    password :'',
                    email:'',
                    mobile:''
                },
                // 显示或隐藏修改用户的对话框
                editDialogVisible :false,
                // 添加表单的验证规则对象
                addFormRules:{
                    username:[
                        { required: true, message: '请输入用户名', trigger: 'blur' },
                        { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ],
                     password:[
                        { required: true, message: '请输入密码', trigger: 'blur' },
                        { min: 6, max: 10, message: '长度在 6 到 10 个字符', trigger: 'blur' }
                    ],
                     email:[
                        { required: true, type: 'email', message: '请输入邮箱', trigger:['blur' , 'change']  }
                    ],
                     mobile:[
                        { required: true, message: '请输入手机号码', trigger: 'blur' },
                        { min: 1, max: 11, message: '长度在为 1 到 11 字符', trigger: 'blur' }
                    ]
                },
                // 修改用户的表单数据
                editForm:{},
                // 添加修改用户的验证规则
                editFormRules : {
                    email:[
                        { required: true, type: 'email', message: '请输入邮箱', trigger:['blur' , 'change']  }
                    ],
                     mobile:[
                        { required: true, message: '请输入手机号码', trigger: 'blur' },
                        { min: 1, max: 11, message: '长度在为 1 到 11 字符', trigger: 'blur' }
                    ]
                },
                // 显示或隐藏分配角色的对话框
                setRoleDialogVisible:false,
                // 存储当前点分配角色的对话框显示的信息,需要被分配角色的用户信息
                userInfo:{},
                // 角色列表数据
                rolesList:[],
                // 已选中的角色id值
                selectedRoleId:'',
            }
        },
        created() {
            this.getUserList() // 获取用户数据列表
            
        },
        methods: {
            async getUserList(){  // 发起axios请求获取用户数据列表
                const {data:res} = await this.$http.get('users', {params:this.queryInfo})
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.userlist = res.data.users
                this.total = res.data.total
            },
            // 监听 pagesize  改变多少条显示
            handleSizeChange(newSize) {
                // console.log(newSize);
                this.queryInfo.pagesize = newSize //重新赋值
                this.getUserList() //从新发起axios请求
            },
            // 监听页码值改变
            handleCurrentChange(newPage) {
                // console.log(newPage);
                this.queryInfo.pagenum = newPage  //改变当前的页码
                this.getUserList() //从新发起axios请求
            },
            // 监听 switch 开关状态的改变
            async userStateChanged(userinfo){
                // console.log(userinfo);
                const {data : res} = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
                if(res.meta.status !== 200) {
                    // 如果失败了但是我们页面中显示修改了 所以要取反
                    userinfo.mg_state = !userinfo.mg_state
                    this.$message.error(res.meta.msg)
                }
                this.$message.success(res.meta.msg)
            },
            // 监听添加用户对话框的关闭事件
            addDialogClosed(){
                this.$refs.addFormRef.resetFields()
            },
            // 添加新用户
            addUser(){
                this.$refs.addFormRef.validate( async (value) => {
                    if(!value) return this.$message.error('请填写正确的信息')
                    // console.log(this.addForm);
                    //发起添加用户的请求
                    const {data : res} = await this.$http.post('users',this.addForm)
                    if(res.meta.status !== 201) return this.$message.error(res.meta.msg)
                    this.$message.success(res.meta.msg)
                    this.addDialogVisible = false  //隐藏对话框
                    this.getUserList()  //重新获取用户列表
                })
            },
            // 点击修改用户信息弹出的对话框
            async showEditDialog(id){
                const {data : res} = await this.$http.get(`users/${id}`)
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.editForm = res.data
                this.editDialogVisible = true
                console.log(this.editForm);
            },
            // 监听修改用户对话框的关闭事件
            editDialogClosed(){
                this.$refs.editFormRef.resetFields()
            },
            // 确定修改用户信息按钮
            editUserInfo(){
                this.$refs.editFormRef.validate( async value => {
                    if(!value) return this.$message.error('修改用户信息失败')
                    const {data : res} = await this.$http.put(`users/${this.editForm.id}`,{email:this.editForm.email,mobile:this.editForm.mobile})
                    if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                    this.getUserList() //重新获取列表
                    this.$message.success(res.meta.msg)//提示用户更新成功
                    this.editDialogVisible = false//关闭弹出框
                })
            },
            // 点击删除用户信息 根据id值删除 会返回 Promise 来处理后续响应
            async removeUserById(id) {
                const confirmResult = await this.$confirm('此操作将永久删除此用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
                }).catch( err  => err) //捕获异常
                // 确定删除返回 confirm
                // 取消删除返回 cancel
                // console.log(confirmResult)
                if(confirmResult !== 'confirm'){
                    return this.$message.info('取消删除') 
                } 
                const {data :res} = await this.$http.delete(`users/${id}`)
                if(res.meta.status === 400 ) return this.$message.error(res.meta.msg) //不能删除admin
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)  // 删除失败
                // 删除成功
                this.$message.success('删除成功')
                this.getUserList() //重新获取用户
                this.editDialogVisible = false //关闭对话框
            },
            // 点击分配角色的事件
            async setRole(userInfo){
                this.userInfo = userInfo;
                // 在展示对话框之前，获取所有角色的列表
                const {data : res} = await this.$http.get('roles')
                if(res.meta.status !== 200) return this.$message.error(res.meta.res)
                this.rolesList = res.data
                this.setRoleDialogVisible = true
            },
            // 点击按钮 分配角色
            async saveRoleInfo(){
                // 判断用户有没有选择分配角色
                if(!this.selectedRoleId) return this.$message.error('请选择要分配的角色')
                const {data : res} = await this.$http.put(`users/${this.userInfo.id}/role`,{rid:this.selectedRoleId})
                if(res.meta.status === 400) return this.$message.error(res.meta.msg)
                if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
                this.getUserList() // 获取用户数据列表
                this.setRoleDialogVisible = false
            },
            // 监听分配角色对话框的关闭事件
            setRoleDialogClose(){
                this.selectedRoleId = ''   //保证关闭时输入框为空
                this.userInfo = {}   
            },
        }
    }
</script>

<style>
.el-breadcrumb{
    padding-bottom: 15px;
    font-size: 12px;
}
.el-card{
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.15) !important;
}
.el-table{
    margin-top: 15px;
    font-size: 12px;
}
</style>